Replace a hard drive with a larger one?
How or where can I find out if the 512GB hard drive in my MacBook Pro (MacBook Pro (Retina, 15-inch, Mid 2014) can be replaced with a bigger drive?
Your MacBook Pro uses a proprietary mSATA SSD. I reccomend OWC’s Aura Pro X because I have one currently installed in my 2012 Retina MacBook Pro and it works without a fuss. To transfer your data from your old SSD to your new SSD you will need a drive enclosure too. Links to these things are below. I also included a guide on how to replace the SSD.
https://eshop.macsales.com/shop/ssd/owc/macbook-pro-retina-display/2013-2014-2015
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[Link edited by Host as following the procedures at the site may lead to damage to the user’s device]